5FJB

Cyclophilin A Stabilize HIV-1 Capsid through a Novel Non- canonical Binding Site


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Cyclophilin a Stabilizes the HIV-1 Capsid Through a Novel Non-Canonical Binding Site.

Liu, C.Perilla, J.R.Ning, J.Lu, M.Hou, G.Ramalho, R.Himes, B.A.Zhao, G.Bedwell, G.J.Byeon, I.Ahn, J.Gronenborn, A.M.Prevelige, P.E.Rousso, I.Aiken, C.Polenova, T.Schulten, K.Zhang, P.

(2016) Nat.Commun. 7: 10714

  • DOI: 10.1038/ncomms10714

  • PubMed Abstract: 
  • The host cell factor cyclophilin A (CypA) interacts directly with the HIV-1 capsid and regulates viral infectivity. Although the crystal structure of CypA in complex with the N-terminal domain of the HIV-1 capsid protein (CA) has been known for nearl ...

    The host cell factor cyclophilin A (CypA) interacts directly with the HIV-1 capsid and regulates viral infectivity. Although the crystal structure of CypA in complex with the N-terminal domain of the HIV-1 capsid protein (CA) has been known for nearly two decades, how CypA interacts with the viral capsid and modulates HIV-1 infectivity remains unclear. We determined the cryoEM structure of CypA in complex with the assembled HIV-1 capsid at 8-Å resolution. The structure exhibits a distinct CypA-binding pattern in which CypA selectively bridges the two CA hexamers along the direction of highest curvature. EM-guided all-atom molecular dynamics simulations and solid-state NMR further reveal that the CypA-binding pattern is achieved by single-CypA molecules simultaneously interacting with two CA subunits, in different hexamers, through a previously uncharacterized non-canonical interface. These results provide new insights into how CypA stabilizes the HIV-1 capsid and is recruited to facilitate HIV-1 infection.


    Organizational Affiliation

    Department of Microbiology, University of Alabama at Birmingham, Birmingham Alabama 35294, USA.,Department of Physics and Beckman Institute, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.,Department of Pathology, Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, USA.,Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA.,Department of Physiology and Cell Biology, Ben-Gurion University of the Negev, Be'er-Sheva, 84105, Israel.,Department of Structural Biology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15260, USA.,Pittsburgh Center for HIV Protein Interactions, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15260, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
GAG POLYPROTEIN
A, B
218Human immunodeficiency virus type 1 group M subtype B (isolate HXB2)Mutation(s): 0 
Gene Names: gag
Find proteins for P04591 (Human immunodeficiency virus type 1 group M subtype B (isolate HXB2))
Go to UniProtKB:  P04591
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PEPTIDYL-PROLYL CIS-TRANS ISOMERASE A
C
164Homo sapiensMutation(s): 0 
Gene Names: PPIA (CYPA)
EC: 5.2.1.8
Find proteins for P62937 (Homo sapiens)
Go to Gene View: PPIA
Go to UniProtKB:  P62937
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-16
    Type: Initial release
  • Version 1.1: 2017-08-23
    Type: Data collection